Quantum Cylinder


Advanced direct-electric water cylinder with capacity ranging from 125–300 L. The Quantum cylinder is the ideal partner to the Quantum space heater for a complete heating and hot water system, or as a standalone hot water system for the electrically heated home.

Features and benefits:

  • G3 compliant and KIWA approved duplex stainless steel unvented cylinder. Designed for use in an all-electric property with off-peak supply or for use with the future Smart grid (additional components required).
  • Intuitive ergonomically designed controls with easy to read display. User adjustable cylinder water temperature and ‘Boost’ immersion heater for rapid re-heat.
  • Factory fitted with 60 mm of CFC/ HCFD free foam insulation (GWP: 1, ODP: 0). Pre-wired immersion heaters and sensors for easy installation.
  • Supplied with factory fitted T&P valve, inlet group, expansion vessel and hose and tundish.
  • 25 year guarantee on the cylinder vessel and two years on other components.
  • ERP rating: C.

General information

Uniclass 2015

Pr_60_50_20_21 Direct hot water storage cylindersPrimary


S90/37 Direct hot water storage cylinders

S90/370 Direct hot water storage cylinders

Specification data - Direct hot water storage cylinders

Product Reference

Quantum Cylinder



Capacity: 125 L. Height: 945 mm. Heat loss: 0.95 kWh.


Capacity: 150 L. Height: 1115 mm. Heat loss: 1.10 kWh.


Capacity: 210 L. Height: 1490 mm. Heat loss: 1.41 kWh.


Capacity: 250 L. Height: 1765 mm. Heat loss: 1.51 kWh.


Capacity: 300 L. Height: 2065 mm. Heat loss: 1.96 kWh.

Standard product features

Technical characteristics:

  • Cylinder diameter: 580 mm.
  • Inner/ outer cylinder: Duplex stainless steel LDX2101/ HIPS.
  • Potable water temperature (maximum): 70°C.
  • Working pressure/ Design pressure (maximum): 3/ 6 bar.
  • Dynamic pressure (minimum)/ Static pressure (maximum): 1.5/ 12 bar.
  • Flow rate (minimum): 15 L/ min.
  • Cold water inlet/ hot water outlet: 22 mm stainless steel.
  • Number of immersion heaters: Two (primary and boost).
  • Immersion heater: 1¾" F BSP 3 kW at 240 V.
  • Pressure reducing valve and strainer: 3 bar.
  • Expansion relief valve: 6 bar.
  • Temperature and pressure relief valve: ½" 7 bar/ 90°C.
  • Factory pressure test: 12 bar.


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